TWTADIXSTactical data information exchange system.TAFTerminal Aerodrome Forecast.TOP SECRETClassified information that ifdisclosed could cause exceptionally grave damageto national security.WANWide area network.WEBSITEA collection of one or more web pagescreated by a person, company, or organization onthe Web.UWEFAXAn acronym for weather facsimile,specifically the NWS service providing satelliteimagery and graphic products via a geostationarysatellite data broadcast.UHFUltra-high frequency radio transmission,WMOWorld meteorological organization.generally between 300 MHz and 3 GHz.URLUniform resource locater.USMTFUnited States message text format.USWUndersea warfare.WORLD WIDE WEBThe large hypertext networkof the Internet. Generally refers to the collection ofwebsites on the Internet and the information thatcan be accessed from them.WPMWords per minute.VXVALIDEffective, good.VHFVery-high frequency radio transmission,generally between 30 MHz and 300 MHz.XBTExpendable bathythermograph, usuallyreferring to the probe that is dropped in the water andnot recovered.AI-4